Stranded-control x-ray system.



L. w. H. SCHIMPFF.

Patented Mar. 19, 1918.

2 SHEETSSHEET I.

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L. W. H. SCHHVIPFF.

STRANDED CONTROL X-RAY SYSTEM.

APPLICATION FILED MAR. 15 1917.

1,260,07Q. Patented Mar. 19, 1918.

2 SHEETSSHEET Z- 5] nvcmfoz [may W15. whim 7 $51 1 anon m1 I UNITED STATES PA LOUIS H. SCHIMPFF, OF NEW YORK, N. Y., ASSIGNOR TO THE KNY-SCHEERER CORPORATION, A CORPORATION OF NEW YOI tK.

STRANDED-CONTROL X-RAY SYSTEM.

Specification of Letters Patent.

Application filed March 15, 1917. Serial No. 154,963.

To all whom it may concern Be it known that I, LOUIS W. H. SCHIMPFF, a citizen of the United States, and a resident of the'city, county, and State of New York,

have invented certain new and useful Improvements in Stranded-Control X-Ray Systems, set forth in the following specification.

This invention relates to X-ray systems. Customarily an X-ray system is for the most part provided in a cabinet mounting the various parts of the apparatus, which in a modern system are many and varied. The object of the present invention is to simplify and consequently cheapen an X-ray system while, at .the same time, preserving efi'iciency, adjustability and maximum penetrating power for any one of various sizes of X-ray tubes which may be employed. Customaril y, in order to adapt an X-ray system for use with varying capacity tubes, a more or less expensive rheostat is provided for the primary circuit and in addition a primary winding is tapped off at various points and connected with a regulator whereby the number of turns and circuit may be varied. These current taps give rise to much difficulty in a high otential transformer of the kind necessary or X-ray work. I propose to carry out my invention by eliminating current taps for the primary and changing the primary winding into a combined rheostat and primary winding by constructing the same out of many strands of resistance wire. By this expediency a simple shunting bridge may be employed to vary the number of strands of the primary winding which are connected in parallel across the source of constant potential alternating current. The above and further objects of my invention will be understood by reference to the illustrative embodiment described in the following specification and shown in the accompanying drawings, which form a part hereof, in which like characters designate corresponding parts in the "several figures, and in which Figure 1 is a diagrammatic representation of mysystem; Fig. 2 is a diagrammatic cross-section drawn to an enlarged scale of my stranded primary conduct-or; and Fig. 3 is a front elevation with parts broken away of a cabinet embodying my system.

The leads 1 indicate a suitable source of constant potential alternating current, which is led to the reversing switch 2 and to the synchronous motor 3. The rectifying switch 4 is directly coupled to the synchronous motor 3 and operates in a usual manner to supply the high potential terminals 5 and in turn the X-ray tube 6 with pulsating high potential current. In my simplified system, all that is necessary both for stepping up the potential and control between the switch 2 Patented Mar. T9, 191%.

and the rectifying switch 4 or between the switch 2 and the X-ray tube 6, if no rectifying switch is employed, are the parts presently to be described.

Intermediate parts.

A suitable core 7 of magnetic material is provided. In the illustration, a core having a closed magnetic circuit is indicated, but it is not desired to limit the invention to a closed magnetic circuit core. Upon this core is wound the desired number of turns of a primary winding 8. This primary winding is a conductor built up of a suitable number of individual conducting strands 9, each having insulation 10, insulating it from its neighbor and from the core. In the embodiment illustrated there are ten (10) strands preferably formed out of resistance wire such as German silver wire or copper strands of proper length and gage. each strand is connected to a contact 11, the contacts 11 preferably being arranged in a circle as a part of the regulator R mounted on the side of the cabinet S. The other One end ofends. of all the strands 9 are connected to a common lead 12 extending to the reversing switch 2, the other pole of which switch is connected by the lead 13 to the conducting bridge 14.- which is rotated about the pivot 15 by the handle 16 of the regulator R.

A wall of insulation 17 preferably surrounds the primary winding 8 and about this insulation is wound a secondary winding T, which is shown comprising four (4:) coils 18, 19, 20 and 21. The entire transformer structure V is preferably contained in an oil tank W.

iVhat ll claim and what I desire to secure by United States Letters Patent is:

'Tn an Xrray system an X-raytube; 'a source of constant potential alternating current; and combined means for stepping up the potential of said source and for regulating the quantity of current for said X-ray tube comprising a core of magnetic materia1,-a primary winding of mutual] insulated strands of resistance wire, a p urality of contacts one for one end of each said 5 strand, 9. commonterminal for all the opposite ends of said strands, a conducting brldge for progressivel shunting said contacts, and a high-potentia secondary winding on said botha regulating rheostat and -taps out of a 10 primary winding are eliminated from the system and full regulation is provided.

1 In witness whereof I have s'i 'ned m name to this specification, this 12th ay of larch,

"LOUIS WM. HQ SCHIMPFF. 

